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Originally Posted by pepo
I have a 1997 Grand Cherokee Laredo 4.0
The check engine code get the "code 21 oxigen sensor"
I've replace with an universal "the ones with 4 wires, 1 black, 1 purple and 2 whites and you have to solder the original plug on it" I've replaced and the code 21 still.
What I'm doing wrong??
Thanks in advance.
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HI, HOW MANY WIRES WERE ON YOUR ORGINAL OXYGEN SENSOR, IF IT HAD LESS WIRES OR MORE YOU MAYBE CUTTING OUT A CIRCUIT THAT WAS ON THE ORGINAL. DALE
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